4,901 research outputs found
Asignación de pseudocolor a arreglos de datos 3-D
No full textCuando una imagen ha sido tomada en blanco y negro es posible que
contenga detalles sutiles que inicialmente son imperceptibles a simple vista. En
casos como el mencionado es útil el uso de técnicas de pseudocoloración que
permiten observar alto contraste en regiones que representan materiales
diferentes. En este trabajo se presenta un modelo óptico para visualizar
arreglos de datos 3-D. Los datos usados son Tomografías Computarizadas
(T.C.) proporcionadas por Toshiba medical de Japón. La reconstrucción en
pseudocolor se realiza simulando el paso de la luz a través de los diferentes
materiales presentes en la tomografía los cuales poseen diferente índice de
refracción. Con éste modelo óptico es posible asignar pseudocolor a los
diferentes medios contenidos en la imagen
Programa de gestión estratégica basado en el modelo de liderazgo de David Fischman para mejorar las relaciones interpersonales del personales directivo, docente y administrativo de la institución educativa N° 10158 ¨Julio C. Tello¨ del centro poblado Cruz del Medano, del distrito de Mórrope
No full textEl presente Trabajo de Investigación simplifica en su contenido un Programa de
Gestión Estratégica basado en el Modelo de Liderazgo de David Fischman para
mejorar las relaciones interpersonales del personal directivo, docente y
administrativo de la Institución Educativa N° 10158 “Julio C. Tello” del centro
poblado Cruz del Médano, distrito de Mórrope considerando que al realizar el
correspondiente análisis de la problemática se constató que, en efecto existe un
endeble ejercicio de las relaciones interpersonales, que limita el desarrollo de los
procesos de gestión de la organización educativa. Ante el problema se ha
trazado como objetivo principal, precisamente, demostrar que la aplicación de un
Programa de Gestión Estratégica basado en el Modelo de Liderazgo de David
Fischman mejora las relaciones interpersonales del personal directivo , docente y
administrativo de la Institución Educativa N° 10158 “Julio C.Tello”, que
fundamentado en la Teoría de la Motivación Humana de Maslow, Teoría del
Liderazgo Personal e Interpersonal de David Fischman, Teoría de las Relaciones
Humanas de Elton Mayo y Teoría del Liderazgo Participativo y Democrático de
Rensis Likert y a partir de la contrastación de la hipótesis se espera lograr un
aporte teórico que contribuya a la solución de la problemática existente, no sólo
en la Institución Educativa N° 10158 “Julio C. Tello", sino también en las demás
instituciones del país
Design of a Wearable Haptic Navigation Tool for Cyclists
No full textSince cyclists do not have their auditory and visual channels completely available while riding a bicycle, it is unsafe for them to use the GPS navigation tool provided by smartphones, which is based on audio and visual cues. In such situations, the haptic channel can be suitable to deliver information. Therefore, a research developing a system that uses haptic cues to give bicycle riders turn-by-turn information was carried out. The proposed solution uses two vibrotactile motors, each one located on each wrist. The motors are controlled by an Arduino board connected via Bluetooth to an Android App which oversees the GPS navigation and provides real-time turn-by-turn instructions. The cyclist is informed on the direction by the vibration of the motors: if the motor vibrating is located on the left wrist then s/he would have to turn left, and the same applies to the other side. We used two types of buzzes: a single buzz indicates a distance of approximately 60 m, and a double buzz points out that the turn is imminent. When both motors are activated at the same time the system communicates to the user the arrival to the destination. The system was initially tested with few users giving positive feedback. The haptic signal was considered intuitive and easy to understand, efficiently providing turn-by-turn navigation instructions
In Vivo Reflectance Confocal Microscopy in Dermatology
No full textImaging techniques capable of noninvasive, high-resolution, skin imaging in vivo have been the focus of recent attention in the dermatology field. These efforts are directed to improve the diagnostic accuracy of skin cancer, especially cutaneous melanoma. Reflectance confocal microscopy (RCM) is an innovative imaging tool that allows the analysis of the skin horizontally with a nearly histological resolution. Similar to dermoscopy images, real-time images obtained by RCM are oriented horizontal to the skin surface (optical transversal sections). Melanin provides strong contrast because of its high refractive index (1.7) relative to the surrounding epidermis. It has been applied in the clinical arena for the diagnosis of melanocytic and nonmelanocytic lesions where it has been proven to increase greatly the diagnostic accuracy when coupled with dermoscopy. Beyond its application in skin oncology, confocal microscopy can be useful to delineate the overall aspect of inflammatory skin disease and infectious ones. The main limitation of RCM is its relatively low penetration through the dermis; a maximum depth of 250-300. μm can currently be achieved, preventing imaging of structures located in the deep dermis and hypodermis. The main challenge is the interpretation of images. Specific photographic atlas, courses, and further development of teledermatology may solve this problem
Crystallisation kinetics of a 2·3Li2O. 1·1ZrO2.6·6SiO2 glass
No full textThe nucleation and growth of zircon (ZrSiO4) crystals on the free surface of a 2·3Li2O.1·1ZrO2.6·6 SiO2 glass was investigated through differential thermal analysis (DTA), x-ray diffraction (XRD) and scanning electron microscopy (SEM). The crystallisation was completed at about 860°C with an activation energy value corresponding to 740 kJmol-1. Samples with polished free surfaces were nucleated at selected temperatures in the range 640-690°C and then heated at 750°C for 30 rain for crystal growth. A dominant effect of surface nucleation was observed and the number of ZrSiO4 crystals per unit area and the mechanism of crystallisation were determined. It was concluded that the nucleation starts from a fixed number of surface nuclei which reach a maximum at 670°C corresponding to a zircon crystal number density of 1·33×1011 m-2 and that at 880°C a uniform surface crystalline layer was formed with a rate of growth of 1·93 μm min-1
Gabriel García Márquez y el cine. La formación de un espectador cinéfilo en Colombia (1927-1961)
No full textGabriel García Márquez’s success as a writer has overshadowed other facets of his life, such as his relationship with films and cinema. In particular, during his formative years (1927-1961) it is worth insisting on his strong connection with cinema, because he had multiple and varied roles, including film critic, promoter of film clubs and film archives, film student and editor of documentaries, among others. The present work explores these overlooked connections between author, work, and cinema, based on a biographical review of García Márquez and recent studies on the history of cinema in Colombia. It also proposes to visibilize these relationships’ rich nuances that promoted both the successive formation of a cinephile spectator in the figure of García Márquez and some of the changes experienced by the film culture in Colombia during these decades of consolidation of a modern spectato
CUHK electronic theses & dissertations collection
No full textAlarcon, Arlynn Gutierrez.Thesis M.Phil. Chinese University of Hong Kong 2015.Includes bibliographical references (leaves 106-111).Abstracts also in Chinese.Title from PDF title page (viewed on 03, January, 2017)
Sounding underground: listening, performing and transforming the commuting experience
No full textIn 1997 the creation of a virtual underground was somehow a bizarre idea that the author attempted to realize. First, the representation of metaphors of a metro in a multimedia format opened ideas of what could be possible to achieve on the Internet, e.g. how sound fragments uploaded by different people could run on the same navigational interface and what this mixture is telling us about our urban culture. How does it sound?
Listening was the practice selected to perceive the whole of space and time relationships within a journey, and how these resonate with each individual. First in London, and later interconnecting the experience with Mexico and Paris, the author followed a mixed ethnographic method with commuters in each city, involving them in reflective and performative listening practices.
Sounding Underground is the resulting interface that links the three cities’ metros, along with their cultures, evoking social, symbolic and political perceptions for each listener. The process followed by participants, and the interaction with the environment by users on the Internet, have opened paths for the acknowledgement and transformation of this experience, as each underground sonic journey becomes potentially a metaphor of a commuter’s life
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